The typical asking rate per listing is in the $10's per square foot per year. The Palos Heights submarket is going through a a rise in rates. In the last 3 months, the median rate rose $16 per sqft per year.
Compared to the rest of the Chicagoland market, the Palos Heights submarket has less expensive rates, so you should have no trouble finding a great deal in this undervalued region.
In the last 90 days, 4 listings have been made available, which means new listings are probably leasing quickly. You'll want to be prepared to make an offer immediately. About 125% of the listings in the Palos Heights are subleases, so you might be able to snag a great spot on a short term. There aren't many listings below 2,000 square feet on the market, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 1,850 sqft. Most buildings in this market are around 1 stories. Most buildings in this area were built in 1973 and are Class B.